package com.lei.util;

import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.ContentType;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HttpClientUtil {
	 public static String doGet(String url, Map<String, String> param) {
		 
	        // 创建Httpclient对象
	        CloseableHttpClient httpclient = HttpClients.createDefault();
	 
	        String resultString = "";
	        CloseableHttpResponse response = null;
	        try {
	            // 创建uri
	            URIBuilder builder = new URIBuilder(url);
	            if (param != null) {
	                for (String key : param.keySet()) {
	                    builder.addParameter(key, param.get(key));
	                }
	            }
	            URI uri = builder.build();
	 
	            // 创建http GET请求
	            HttpGet httpGet = new HttpGet(uri);
	 
	            // 执行请求
	            response = httpclient.execute(httpGet);
	            // 判断返回状态是否为200
	            if (response.getStatusLine().getStatusCode() == 200) {
	                resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
	            }
	        } catch (Exception e) {
	            e.printStackTrace();
	        } finally {
	            try {
	                if (response != null) {
	                    response.close();
	                }
	                httpclient.close();
	            } catch (IOException e) {
	                e.printStackTrace();
	            }
	        }
	        return resultString;
	    }
	 
	    public static String doGet(String url) {
	        return doGet(url, null);
	    }
	 
	    public static String doPost(String url, Map<String, String> param) {
	        // 创建Httpclient对象
	        CloseableHttpClient httpClient = HttpClients.createDefault();
	        CloseableHttpResponse response = null;
	        String resultString = "";
	        try {
	            // 创建Http Post请求
	            HttpPost httpPost = new HttpPost(url);
	            // 创建参数列表
	            if (param != null) {
	                List<NameValuePair> paramList = new ArrayList<>();
	                for (String key : param.keySet()) {
	                    paramList.add(new BasicNameValuePair(key, param.get(key)));
	                }
	                // 模拟表单
	                UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList,"utf-8");
	                httpPost.setEntity(entity);
	            }
	            // 执行http请求
	            response = httpClient.execute(httpPost);
	            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
	        } catch (Exception e) {
	            e.printStackTrace();
	        } finally {
	            try {
	                response.close();
	            } catch (IOException e) {
	                // TODO Auto-generated catch block
	                e.printStackTrace();
	            }
	        }
	 
	        return resultString;
	    }
	 
	    public static String doPost(String url) {
	        return doPost(url, null);
	    }
	 
	    public static String doPostJson(String url, String json) {
	        // 创建Httpclient对象
	        CloseableHttpClient httpClient = HttpClients.createDefault();
	        CloseableHttpResponse response = null;
	        String resultString = "";
	        try {
	            // 创建Http Post请求
	            HttpPost httpPost = new HttpPost(url);
	            // 创建请求内容
	            StringEntity entity = new StringEntity(json, ContentType.APPLICATION_JSON);
	            httpPost.setEntity(entity);
	            // 执行http请求
	            response = httpClient.execute(httpPost);
	            resultString = EntityUtils.toString(response.getEntity(), "utf-8");
	        } catch (Exception e) {
	            e.printStackTrace();
	        } finally {
	            try {
	                response.close();
	            } catch (IOException e) {
	                // TODO Auto-generated catch block
	                e.printStackTrace();
	            }
	        }
	 
	        return resultString;
	    }
	    public static void main(String[] args) {
//	    	查询所有
//			String result = doGet("http://localhost:8080/mySpringMVC/user/pageUser");
//			System.out.println(result);
			//html < &gt; > &lt;
			//mysql table  `table`
//			添加
//			String json="{\"name\":\"zhangshan\",\"age\":12}";
//			String result = doPostJson("http://localhost:8080/mySpringMVC/user/user", json);
//			System.out.println(result);
			String id= "{\"id\":1}";
//			String result = doGet("http://localhost:8080/mySpringMVC/user/pageUser",id);
//			System.out.println(result);
		}
}
